With the acceleration of the process of lacustrization, the ensuing eutrophication disaster of water body has an increasing impact on people's normal life and production. Lake water body calculation model is an important means to realize the mechanism analysis, risk assessment and loss calculation of eutrophication disaster. Aiming at the problems and difficulties existing in the research of eutrophication of lake water, this paper introduces the advanced idea of multi-level grid(MLG) of spatial information to solve the above problems, discusses the general idea of MLG construction method of eutrophication of water, proposes the related technologies of grid spatial database, and finally builds a series of analysis and decision-making models based on MLG through the parameter collection and calibration test analysis of MLG experimental model, Provide strong data support for the prevention and control of water eutrophication(VE) disasters.

Amare Charun. Water Eutrophication based on Multilevel Grid. Academic Journal of Environmental Biology (2020), Vol. 1, Issue 4: 9-18. https://doi.org/10.38007/AJEB.2020.010402.

[1] Rp A, Mb A, Tg A, et al. A techno economic analysis of the power to gas route. Journal of CO2 Utilization, 2019, 34(C):616-634. https://doi.org/10.1016/j.jcou.2019.07.009

[2] Mohapatra S R, Agarwal V. Model Predictive Control for Flexible Reduction of Active Power Oscillation in Grid-Tied Multilevel Inverters Under Unbalanced and Distorted Microgrid Conditions. IEEE Transactions on Industry Applications, 2020, 56(2):1107-1115. https://doi.org/10.1109/TIA.2019.2957480

[3] Manai L, Hakiri D, Besbes M. Backstepping control of flying capacitor multilevel inverter-based active power filter. IET Power Electronics, 2020, 13(19):4610-4624. https://doi.org/10.1049/iet-pel.2020.0734

[4] Kish G J. On the Emerging Class of Non-Isolated Modular Multilevel DC–DC Converters for DC and Hybrid AC–DC Systems. Smart Grid IEEE Transactions on, 2019, 10(2):1762-1771.

[5] Guidi G, D'Arco S, Nishikawa K, et al. Load Balancing of a Modular Multilevel Grid Interface Converter for Transformer-Less Large-Scale Wireless Electric Vehicle Charging Infrastructure. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2020, PP(99):1-1.

[6] Dalu T, Wasserman R J, Magoro M L, et al. River nutrient water and sediment measurements inform on nutrient retention, with implications for eutrophication. Science of The Total Environment, 2019, 684(20 Sept):296-302.

[7] Prasertphon R, Jitchum P, Chaichana R. Water Chemistry, Phytoplankton Diversity And Severe Eutrophication With Detection Of Microcystin Contents In Thai Tropical Urban Ponds. Applied Ecology and Environmental Research, 2020, 18(4):5939-5951.

[8] Jaiswal D, Pandey J. An ecological response index for simultaneous prediction of eutrophication and metal pollution in large rivers. Water Research, 2019, 161(SEP.15):423-438. https://doi.org/10.1016/j.watres.2019.06.030

[9] Larico A, Medina S. Application of WASP model for assessment of water quality for eutrophication control for a reservoir in the Peruvian Andes. Lakes & Reservoirs, 2019, 24(1):37-47. https://doi.org/10.1111/lre.12256

[10] Hassan M H, Stanton R, Secora J, et al. Ultrafast Removal of Phosphate from Eutrophic Waters Using a Cerium-Based Metal–Organic Framework. ACS Applied Materials And Interfaces, 2020, 12(47):52788-52796. https://doi.org/10.1021/acsami.0c16477

[11] Hussein R M, Sen B, Sonmez F. Eutrophication Processand Water Quality Indices. International Journal of Engineering Technologies and Management Research, 2020, 6(9):76-83.

[12] Pierzchaa U. Assessment of the possibility of using remote sensing methods for measuring eutrophication of inland water reservoirs. Inżynieria Ekologiczna, 2020, 21(4):27-32. https://doi.org/10.12912/23920629/129586

[13] Jahan H K, Abapour M. Switched-Capacitor-Based Multilevel Inverter for Grid-Connected Photovoltaic Application. IEEE Transactions on Power Electronics, 2020, PP(99):1-1.

[14] Bougarne L, Abbou M B, Haji M E, et al. Consequences of surface VE: remedy and environmental interest. Materials Today: Proceedings, 2019, 13(12):654-662. https://doi.org/10.1016/j.matpr.2019.04.025

[15] Chamarthi P, Al-Durra A, El-Fouly T, et al. A Novel Three-Phase Transformerless Cascaded Multilevel Inverter Topology for Grid-Connected Solar PV Applications. IEEE Transactions on Industry Applications, 2020, PP(99):1-1.

[16] Raudsepp U, Maljutenko I, Kouts M, et al. Shipborne nutrient dynamics and impact on the eutrophication in the Baltic Sea. The Science of the Total Environment, 2019, 671(JUN.25):189-207.

[17] Chetia R, Sawasdee V, Popradit A, et al. Alteration of Spatial Pollution Compounds to Eutrophication Phenomenon of Small-Scale Area under Corona Virus Disease Circumstances. Journal of Environmental Management and Tourism, 2020, 12(3(51)):613-620. https://doi.org/10.14505//jemt.v12.3(51).01

[18] Derolez V, Bec B, Munaron D, et al. Recovery trajectories following the reduction of urban nutrient inputs along the eutrophication gradient in French Mediterranean lagoons. Ocean & Coastal Management, 2019, 171(APR.):1-10. https://doi.org/10.1016/j.ocecoaman.2019.01.012